Function for reception
In-flight mode ( )..................
→
Function to prevent the GPS signal reception function from
working.
Set this mode when boarding an airplane, etc.
Satellite acquisition status
display function......................
Displays by the seconds hand the number of GPS satellite
from which GPS signals are received during GPS signal
reception.
Reception result display
function....................................
Displays the latest reception result (success/failure).
Time zone setting check
function....................................
Displays the currently set time zone.
Other functions
Dual time display function.....
The time of an area different from the time of the main-dial
is displayed with the sub-dial at the 6 o’clock position (12-
hour) and the AM/PM hand.
Automatic hand position
alignment function..................
Automatically corrects misalignment when the hands are
misaligned due to external factors such as magnetic
influence.
Automatic leap second
reception function..................
Automatically receives leap second data when leap
second data reception is necessary.
Switch function for the main-
dial and sub-dial.....................
Your watch can switch between the times of its main-dial
and sub-dial.
It can also switch DST.
SPECIFICATIONS
1. Basic function
Main-dial (hour, minute, and seconds hands), date display, day display, indicator
function, dual time display function (with AM/PM hand), world time function (39 time
zones)
2. Frequency of crystal
oscillator
32,768 Hz (Hz = Hertz ... Cycles per second)
3. Loss/gain (monthly
rate)
Loss / gain ±15 seconds on a monthly rate (When the watch is used without an
automatic time setting by receiving GPS signal and when it is worn on the wrist within
a normal temperature range between 5°C and 35°C (41°F and 95°F)).
4. Operational
temperature range
Between −10°C and +60°C (14°F and 140°F)
5. Driving system
Step motor: main-dial (hour, minute, and seconds hands), day hand, indicator hand
and date, sub-dial (hour, minute, and AM/PM hand).
6. Power source
Secondary battery, 1 piece
7. Duration of operation
About 6 months (on a full charge, without power save function)
* If the Power Save is activated after it is fully charged, the watch continues to run for
approximately 2 years at maximum.
8. GPS signal reception
function
Time zone adjustment, manual time adjustment, automatic time adjustment
* Between reception and the next reception, the watch operates with the above quartz
precision
9. IC (Integrated Circuit)
Oscillator, frequency divider and driving circuit C-MOSIC, 4 pieces
* The specifications are subject to change without prior notice due to product improvements.
Declaration of Conformity
Copyright ©2019 by SEIKO WATCH CORPORATION
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FUNCTION LIST/SPECIFICATIONS
ASTRON 5X53 GPS SOLAR
